<template>
    <div class="app">
        <!-- 头部 header -->
        <mt-header fixed title="天泰教育-17软5">
			<span slot="left" @click="goBack" v-show="flag">
				<mt-button icon="back">返回</mt-button>
			</span>
		</mt-header>
        <!-- 中间内容部分 -->
		<transition name="app">
			<router-view></router-view>
		</transition>		

        <!-- tabbar 底部导航 -->
		<nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">用户</span>
			</router-link>
			<router-link class="mui-tab-item" to="/cart">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="badge">{{$store.getters.getGoodsNumber}}</span></span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>
    </div>
</template>
<script>
import goback from './components/tabbar/goBack.vue'
	export default {
		data(){
			return {
				flag:false,		
			}
		},
		methods:{
			goBack(){
				this.$router.go(-1);
			}
		},
		watch:{  //监听路由的变化  如果为首页 就不显示返回按钮 
			'$route.path':function(newval){
				if(newval=='/home'){
					this.flag = false;
				}else{
					this.flag = true;
				}
			}
		}
	
	}
</script>
<style lang="scss" scoped>
    // .app{
    //     padding-top: 40px;
	// 	overflow-x: hidden;
    // }
	// .app-enter{
	// 	opacity: 0;
	// 	transform: translateX(100%)
	// }
	// .app-leave-to{
	// 	opacity: 0;
	// 	transform: translateX(-100%)
	// }
	// .app-enter-active,.app-leave-active{
	// 	opacity: 0;
	// 	transition: all .5s ease;
	// }
</style>
